Crop protection

Dazide PGR receives lower REI for 2020

Growers can now treat crops, then start working the next morning thanks to a 50% reduction in the Dazide plant growth regulator’s re-entry interval (REI) – 12 hours instead of 24. “This marks a huge gain in efficiency – something to take into account when deciding which daminozide PGR to preorder ahead…

€250,000 investment for developer of insect control drones

Insects are a huge problem in greenhouse horticulture. Pest control costs growers enormous amounts of money and energy and causes the sector much concern. Currently, pests tend to be controlled with biopesticides and chemical pesticides. But there is now a chemical-free solution and it comes from the…

Species diversity in Colletotrichum causing anthracnose of aromatic and ornamental lamiaceae in Italy

Species of Colletotrichum are considered important plant pathogens, saprobes, and endophytes on a wide range of host plants. In Italy, several Colletotrichum species have been reported in glasshouse environments. In this study the occurrence, diversity, and pathogenicity of Colletotrichum spp. associated…

Plants use a common ‘language’ for emergency alerts

There’s long been a theory that talking to plants can help them grow better. But what if plants themselves could “talk” to each other? That’s a question that André Kessler, professor of ecology and evolutionary biology, and his research team addressed over a 12-year study that examined plant-to-plant…

Pyrethrum’s rich history in Kenya and old good days

Pyrethrum is a naturally occurring mixture of chemicals found in certain chrysanthemum flowers. It was first recognised to have insecticidal properties around 1800AD in Asia and was used to kill ticks and various insects such as fleas and mosquitoes. Six individual chemicals have active insecticidal…

Rare insect pest intercepted at US-Mexican border

When CBP agriculture specialists inspected a commercial shipment of prickly pear pads arriving from Mexico, they found a rare pest that has never been seen in the United…

Supplementary feeding of predatory mites with pollen yields exceptional results

At Erik Boers’ company in ’s-Gravenzande thrips are a regular uninvited guest. Erik grows both amaryllis bulbs and flowers on 6.5 hectares. The bulbs, which are grown in open soil, are sold for dry sales while the flowers, cultivated on clay pellets, are marketed during the winter season. Erik is a…

US: Miticides expand to insecticides

FIFRA 25(b)-exempt botanical-oil-based contact miticides, TetraCURB Concentrate and TetraCURB Organic, are now labeled as insecticides for use in controlling a wide range of small, soft-bodied insects – such as aphids and whiteflies – on all crops. Two-spotted spider mites, aphids and whiteflies are some…

France: Xylella fastidiosa detected in two olive trees

In France, Xylella fastidiosa was first reported in 2015. It currently occurs in Corse, as well as in 19 municipalities of Alpes-Maritimes and Var (Provence-Alpes-Côte d’Azur region). In September 2019, the French Ministry of Agriculture reported the detection of the bacterium in 2 symptomatic olive…

First record of Ranunculus white mottle virus from Australia

In 2004, a vein yellowing disease of soil-grown greenhouse capsicum was observed in southern Australia. Symptoms were similar to those of pepper yellow vein disease, a suspected viral disease of capsicum transmitted by soilborne Olpidium species. Disease symptoms were apparent on young plants and faded…

Boxwood blight: Threat to ornamentals

Boxwood blight, caused by Calonectria pseudonaviculata and Calonectria henricotiae, has had devastating effects in gardens since its first appearance in the United Kingdom in 1994. The disease affects two other plants in the Buxaceae: sweet box (Sarcococca spp.) and pachysandra (Pachysandra spp.). C.…

Australia: Latest snapshot of plant biosecurity system released

Plant Health Australia (PHA) is pleased to release the National Plant Biosecurity Status Report for 2018 which documents some of the key events of the year and the many layers of the plant biosecurity system that is protecting the plant industries and the environment. Australia is fortunate to be free…

Kenyan exporters fight bid for pesticide ban

Fresh produce exporters have joined agro-chemical dealers in protesting efforts by Parliament to ban the use of “harmful” pesticides in Kenya. Fresh Produce Exporters…

Keeping Florida’s diverse horticulture industry healthy

When humans develop signs and symptoms of sickness or infection, they turn to medical health professionals. When fruit crops, vegetables, and ornamental plants show signs and symptoms of illness or disease, growers and horticulture businesses turn to plant pathologists. In south Florida, growers and…

Customers discover the underside of the production of their beneficials

On Wednesday the 18th of September, on the sidelines of the Tech & Bio exhibition located in Bourg-lès-Valence, Bioline Agrosciences opened its doors to around a hundred customers during its Open Day. Taking advantage of their visit to the largest exhibition dedicated to organic agriculture and…

Pest control experts from Netherlands to tip Kenyan growers

The Netherlands government is set to engage over 300 Kenyan horticultural produce growers and exporters to the European Union (EU) and Australian markets in formulating strategies towards curbing pests and diseases which have led to the rejection of the country’s products at international markets. The…

First report of reddish brown spot disease on red-fleshed dragon fruit in Malaysia

Scientists of University Sains Malaysia (Penang, Malaysia) have detected firstly the reddish brown spot disease on dragon fruit in Malaysia. They collected stems of red-fleshed dragon fruit (Hylocereus polyrhizus) with reddish brown spots from Negeri Sembilan and Johor states, then analysed the…

Empowering taxonomic research on important pollinators

The family Syrphidae, commonly called hover flies or flower flies, include some 6,000 living species. As “one of the most abundant groups of flower-visiting insects”, with adults of most species feeding almost exclusively on pollen and nectar or honeydew, these flies are among the most important…

US (MI): Preventing boxwood blight in nurseries

Boxwood blight was detected on plants sold at retailers during the spring sales season in Michigan. Nursery growers should be familiar with the symptoms and vigilant when inspecting their own stock and buying in product from other nurseries. by Heidi Lindberg, Michigan State University Extension; Jan…

Australia: Scientists find flowers spread bee disease

James Cook University scientists have discovered a common honey bee disease can be deadly to native Australian wild bees and can be transmitted by flowers – the first time this link has been made. JCU’s Associate Professor Lori Lach oversaw the study investigating the susceptibility of Australian…

HTA offers advice to members on Xylella findings in France

The French plant health authorities have recently announced new findings of Xylella fastidiosa on two ornamental olive trees which are from two areas that were demarcated in 2015, one area for Xylella fastidiosa subspecies multiplex and the other for Xylella fastidiosa subspecies pauca. The findings of…

Tips and tricks for growing cleaner plants

Creating a phytosanitary plan doesn’t have to be a daunting endeavor. There are many simple steps you can take to grow cleaner plants. Saunders Brothers has worked with many researchers and Extension agents to establish a protocol to help prevent the introduction and spread of Boxwood Blight at their…

UK: Caution urged by growers and traders on oak imports

A group of Horticultural Trades Association (HTA) traders and growers are urging importers to ensure oaks being brought into the UK not only comply with current legislation to combat Oak Processionary Moth (OPM), but are not sourced from Italy’s recently declared Pest Free Area (PFA). The HTA are seeking…

Chrysanthemum grower aims to eliminate the need for chemicals all year round

Anyone who wants to achieve success with biological crop protection will have to invest in natural enemies or other products as well as in a professional approach. This is the experience of chrysanthemum grower Linflowers in Bommelerwaard in the Netherlands. Eight years ago, the company started…

US (AR): Student intern Gomez researched blackberry and Peony plant viruses as Adair Scholar

Ioannis Tzanetakis, professor of plant virology at the University of Arkansas, received help from a student intern this summer with a project on the epidemiology of berry and ornamental viruses. Epidemiology is the study of incidence, distribution and possible control of diseases and other factors…

US: OHP launches Fuerte Herbicide

OHP has introduced Fuerte Herbicide, a pre-emergent combination granular product that controls broadleaf and grassy weeds in field, container, and landscape ornamentals. Fuerte provides residual weed control of many common and difficult-to-control weeds such as oxalis, spurge, and elicpta on trees,…

October 9, Rouse HIll

Australia: IPM workshop coming up in NSW

NSW production nurseries are invited to attend an upcoming biosecurity workshop on ‘Integrated Pest Management, Insect and Mite Identification’ on 9 October 2019 at Rouse Hill. In collaboration with NGIA, the Queensland Department of Agriculture (QDAF) will deliver a workshop on how to prevent pests from…

Extra feeding of montdorensis in chrysanthemum: "significantly lower thrips pressure"

Regarding the predatory mite Transeius montdorensis against thrips, it is known that feeding its population extra increases its effectiveness in the chrysanthemum crop. Because this knowledge is based on old research, Koppert once again checked the effects. In the context of a study for Perfect…

CAN (ON): What you need to know about thrips and whitefly control

It’s that time of year again where two of the biggest crops cross over: fall pot mums and poinsettia. This means growers have to simultaneously keep an eye on the two biggest pests in the industry: thrips (usually western flower thrips) and Bemisia whitefly. by Sarah Jandricic, Greenhouse Floriculture…

Netherlands: Finding of Scirtothirps dorsalis on ornamental plants for planting of Podocarpus

A report from the Netherlands Food and Consumer Product Safety Authority concerns the official finding of Scirtothirps dorsalis in the Netherlands on August 15, 2019, on…

UK tightens inspection on import of roses due to Rose Rosette Virus

The United Kingdom (UK) has tightened the import measures for roses (Rosa Sp.) from Canada, India, Mexico or the United States (US) with effect from 23 July 2019. The measures concern the continuing problems in these countries with the Rose Rosette Virus. The measures apply to all rose products from…

US (MA): Black rot of ornamental cabbage and kale

Black rot was observed on both ornamental cabbage and kale in the UMass Extension Plant Diagnostic Lab this week. This disease occurs when the bacterium Xanthomonas campestris pv. campestris enters the hydathodes (leaf pores) and begins to colonize the leaves. Characteristic symptoms of black rot include…

Acelepryn insecticide now labeled for ornamentals

US: Targeted insecticide offers extended residual protection to help save time and labor

Acelepryn insecticide from Syngenta has been approved by the U.S. Environmental Protection Agency for use in ornamental nurseries as well as greenhouses. Powered by the active ingredient chlorantraniliprole, Acelepryn provides long-lasting control of Japanese beetles, sawfly larvae and leaf-feeding…

10 questions about Xylella fastidiosa

Xylella fastidiosa is a bacterium that causes a lot of damage and therefore has a quarantine status within the EU. The experts at Wageningen University & Research use their knowledge about plant pathogenic bacterial diseases for the detection and recognition of this bacterium and later possibly also for…

New Zealand: Why nurseries should get involved in the PPBS

A pilot for the Plant Production Biosecurity Scheme (PPBS) has been underway in 20 nurseries around New Zealand since February and the benefits of the scheme are fast becoming apparent, says PPBS project lead John Liddle. The PPBS is a systematic approach to biosecurity risk management. The scheme’s…

CAN (ON): IPM in August

Lots of hairy caterpillars can be found feeding openly on foliage of nursery and landscape ornamentals this time of year, like Hickory tussock Moth (Lophocampa caryae, Family: Erebidae) and the very common Virginian tiger moth (Spilosoma virginica, Family: Erebidae, Subfamily Arctiinae). Try to avoid the Hickory Tussock moth…

Plant protection workshops coming to Northern Australia

Nursery & Garden Industry Australia has teamed up with the Northern Territory Government and the Australian Department of Agriculture to deliver a series of free and practical plant protection workshops for growers in Northern Australia. Held across the NT, QLD and WA, the workshops will assist growers…

GroentenFruit Huis and Greenhouse Horticulture Netherlands respond to small matter

"Fruit moth is an African problem; no problems in Dutch peppers"

"We did not receive any notification from bell pepper growers that the African fruit moth has been encountered in the greenhouse," Sjaak van der Tak, chairman of Greenhouse…

CAN (ON): CleanFARMS collection dates released

CleanFARMS will be offering its obsolete and unwanted pesticides collection campaign this fall. This program allows farmers to bring in unwanted or obsolete agricultural…

UK: DCF funded student makes headway in Agapanthus pest project

The David Colegrave Foundation (DCF) is delighted to be funding Julie Lin, a Biological Sciences student at Imperial College London, as part of a Plant Health Undergraduate Studentship. DCF worked with the Royal Society of Biology (RSB) to select a plant health project for its Plant Health Undergraduate…

Increased number found in Kenyan, Tanzanian roses

NL: "False codling moth is a serious threat, but the risks should not be exaggerated"

A little animal causes a big fuss in the ornamental and horticultural industry today. Dutch media report how an increase in the discovery of the false codling moth (Thaumatotibia leucotreta) in roses imported fr…

Eternal Flowers produces own pest control products, fertilizers:

Ecuadorian grower goes for 100% organic

"If we can do it, why can't chemical suppliers?" says Adrian Moreno of Eternal Flower. This Ecuadorian Gypsophila and Hypericum grower invested years in producing their own organic fertilizers and pesticides. "I think it is good that everyone in the industry sees that it is possible to be a 100% organic…

CAN (ON): Which type of crop protection is effective for whitefly?

Efficacy trials are key to keeping growers informed about which chemicals currently work and which don’t for Bemisia whitefly. Entomologists at the University of Maryland and Delaware recently did such a study, and included newer pesticide registrations. A typical poinsettia crop in Ontario can battle…

Plant viruses may be reshaping our world

The community of viruses is staggeringly vast. Occupying every conceivable biological niche, from searing undersea vents to frigid tundra, these enigmatic invaders, hovering between inert matter and life, circumnavigate the globe in the hundreds of trillions. They are the most abundant life forms on…

A new collaborative research project managed by Hort Innovation

Defending Australia against the number 1 crop killer - Xylella

What has been dubbed the number one plant biosecurity threat to Australia is now under the spotlight through a new Hort Innovation funded project aimed at building Australia’s…

US: OHP adds Sarisa and Pradia Insecticide to portfolio

OHP is excited to announce the introduction of Sarisa Insecticide and Pradia Insecticide to the ornamental nursery and greenhouse market.  Sarisa Insecticide Saricsa Insecticide is a revolutionary new product for broad-spectrum control of insect pests on ornamental greenhouse and nursery stock. Sarisa™ Insecticide…

using LED as an additional tool

Early disease detection with SporeCam sensors

LumiGrow is launching a new product-line of early disease detection sensors and services. The LumiGrow SporeCam sensors (powered by Scanit Technologies) can capture, inspect, and classify harmful airborne spores for diseases such as Powdery Mildew and Botrytis. The result is growers can optimize pest…

Andermatt Biocontrol acquires 22% shareholding in Agricheck SRL

The Swiss-based company, Andermatt Biocontrol, took 22% shareholding stake in the Argentinian company Agricheck SRL. Agricheck is a leading provider of biological solutions…


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